<?php

function xml2array($contents, $get_attributes=1, $priority = 'tag') {
	if(!$contents) return array();

	if (!function_exists('xml_parser_create')) {
		//print "'xml_parser_create()' function not found!";
		return array();
	}
	
	//Get the XML parser of PHP - PHP must have this module for the parser to work
	$parser = xml_parser_create();
	xml_parser_set_option($parser, XML_OPTION_TARGET_ENCODING, "UTF-8"); # http://minutillo.com/steve/weblog/2004/6/17/php-xml-and-character-encodings-a-tale-of-sadness-rage-and-data-loss
	xml_parser_set_option($parser, XML_OPTION_CASE_FOLDING, 0);
	xml_parser_set_option($parser, XML_OPTION_SKIP_WHITE, 1);
	xml_parse_into_struct($parser, trim($contents), $xml_values);
	xml_parser_free($parser);

	if(!$xml_values) return;//Hmm...

	//Initializations
	$xml_array = array();
	$parents = array();
	$opened_tags = array();
	$arr = array();

	$current = &$xml_array; //Refference

	//Go through the tags.
	$repeated_tag_index = array();//Multiple tags with same name will be turned into an array
	foreach($xml_values as $data) {
		unset($attributes,$value);//Remove existing values, or there will be trouble

		//This command will extract these variables into the foreach scope
		// tag(string), type(string), level(int), attributes(array).
		extract($data);//We could use the array by itself, but this cooler.

		$result = $priority == 'tag' ? (empty($value) ? '' : $value) : array('name'=>$value);
		$attributes_data = array();

		//Set the attributes too.
		if(isset($attributes) and $get_attributes) {
			foreach($attributes as $attr => $val) {
				if($priority == 'tag') $attributes_data[$attr] = $val;
				else $result['attr'][$attr] = $val; //Set all the attributes in a array called 'attr'
			}
		}

		//See tag status and do the needed.
		if($type == "open") {//The starting of the tag '<tag>'
			$parent[$level-1] = &$current;
			if(!is_array($current) or (!in_array($tag, array_keys($current)))) { //Insert New tag
				$current[$tag] = $result;
				if($attributes_data) $current[$tag. '_attr'] = $attributes_data;
				$repeated_tag_index[$tag.'_'.$level] = 1;

				$current = &$current[$tag];

			} else { //There was another element with the same tag name

				if(isset($current[$tag][0])) {//If there is a 0th element it is already an array
					$current[$tag][$repeated_tag_index[$tag.'_'.$level]] = $result;
					$repeated_tag_index[$tag.'_'.$level]++;
				} else {//This section will make the value an array if multiple tags with the same name appear together
					$current[$tag] = array($current[$tag],$result);//This will combine the existing item and the new item together to make an array
					$repeated_tag_index[$tag.'_'.$level] = 2;

					if(isset($current[$tag.'_attr'])) { //The attribute of the last(0th) tag must be moved as well
						$current[$tag]['0_attr'] = $current[$tag.'_attr'];
						unset($current[$tag.'_attr']);
					}

				}
				$last_item_index = $repeated_tag_index[$tag.'_'.$level]-1;
				$current = &$current[$tag][$last_item_index];
			}

		} elseif($type == "complete") { //Tags that ends in 1 line '<tag />'
			//See if the key is already taken.
			if(!isset($current[$tag])) { //New Key
				$current[$tag] = $result;
				$repeated_tag_index[$tag.'_'.$level] = 1;
				if($priority == 'tag' and $attributes_data) $current[$tag. '_attr'] = $attributes_data;

			} else { //If taken, put all things inside a list(array)
				if(isset($current[$tag][0]) and is_array($current[$tag])) {//If it is already an array...

					// ...push the new element into that array.
					$current[$tag][$repeated_tag_index[$tag.'_'.$level]] = $result;

					if($priority == 'tag' and $get_attributes and $attributes_data) {
						$current[$tag][$repeated_tag_index[$tag.'_'.$level] . '_attr'] = $attributes_data;
					}
					$repeated_tag_index[$tag.'_'.$level]++;

				} else { //If it is not an array...
					$current[$tag] = array($current[$tag],$result); //...Make it an array using using the existing value and the new value
					$repeated_tag_index[$tag.'_'.$level] = 1;
					if($priority == 'tag' and $get_attributes) {
						if(isset($current[$tag.'_attr'])) { //The attribute of the last(0th) tag must be moved as well

							$current[$tag]['0_attr'] = $current[$tag.'_attr'];
							unset($current[$tag.'_attr']);
						}

						if($attributes_data) {
							$current[$tag][$repeated_tag_index[$tag.'_'.$level] . '_attr'] = $attributes_data;
						}
					}
					$repeated_tag_index[$tag.'_'.$level]++; //0 and 1 index is already taken
				}
			}

		} elseif($type == 'close') { //End of tag '</tag>'
			$current = &$parent[$level-1];
		}
	}

	return($xml_array);
}

class arrayXml extends DOMDocument {
	protected $root;
	function __construct($root = 'root')
	{
		parent::__construct('1.0', 'utf-8');
		$this->formatOutput = true;
		$this->root = $this->appendChild($this->createElement($root));
	}
	function createNode($arr, $node = null)
	{
		if (is_null($node))
		{
			$node = $this->root;
		}
		foreach($arr as $key => $val) 
		{
			$key = is_numeric( $key ) ? 'node' : $key;
			
			$child = $this->createElement($key);
			$node->appendChild($child);
			
			if (is_array($val))
			{
				$this->createNode($val, $child);
			}
			else
			{
				$child->appendChild($this->createCDATASection($val));
			}
		}
	}
}
function array2xml($array, $root = 'root')
{
	$dom = new arrayXml($root);
	$dom->createNode($array);
	return $dom->saveXML();
}

function file_get_xmlarray($file, $root=null)
{
	if (false === ($contents = @file_get_contents($file))
		|| !($arr = xml2array($contents)))
	{
		return array();
	}
	return $root ? $arr[$root] : $arr;
}
function file_put_xmlarray($file, $array)
{
	$root = key($array);
	$xml = array2xml($array[$root], $root);
	return write_file($file, $xml);
}